Certified Benz & Beemer Compares 2016 BMW Z4 VS 2015 Porsche Boxster Near Scottsdale, AZ

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2016 BMW Z4

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VS

2015 Porsche Boxster

Safety Comparison

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The Z4 has standard BMW Assist, which uses a global positioning satellite (GPS) receiver and a cellular system to remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The Boxster doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.

Both the Z4 and the Boxster have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and available rear parking sensors.

Warranty Comparison

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The Z4’s corrosion warranty is 2 years longer than the Boxster’s (12 vs. 10 years).

BMW pays for scheduled maintenance on the Z4 for 4 years and 50,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Porsche doesn’t pay scheduled maintenance for the Boxster.

There are over 74 percent more BMW dealers than there are Porsche dealers, which makes it much easier should you ever need service under the Z4’s warranty.

Engine Comparison

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The Z4 has more powerful engines than the Boxster:

Horsepower

Torque

Z4 sDrive28i 2.0 turbo 4 cyl.

240 HP

260 lbs.-ft.

Z4 sDrive35i 3.0 turbo 6 cyl.

300 HP

300 lbs.-ft.

Z4 sDrive35is 3.0 turbo 6 cyl.

335 HP

332 lbs.-ft.

Boxster 2.7 DOHC 6 cyl.

265 HP

207 lbs.-ft.

Boxster S 3.4 DOHC 6 cyl.

315 HP

266 lbs.-ft.

Boxster GTS 3.4 DOHC 6 cyl.

330 HP

273 lbs.-ft.

As tested in Road & Track the Z4 sDrive35is 3.0 turbo 6 cyl. is faster than the Boxster S 6 cyl. (automatics tested):

Z4

Boxster

Zero to 60 MPH

4.4 sec

4.5 sec

Zero to 100 MPH

10.6 sec

11.3 sec

Quarter Mile

12.9 sec

13 sec

Speed in 1/4 Mile

109.9 MPH

107.4 MPH

Fuel Economy and Range Comparison

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On the EPA test cycle the Z4 gets better fuel mileage than the Boxster:

Z4

Boxster

4 cyl./Manual

22 city/34 hwy

20 city/30 hwy

6 cyl.

cyl./Manual

n/a

20 city/28 hwy

4 cyl./Auto

22 city/33 hwy

22 city/32 hwy

6 cyl.

6 cyl./Auto

n/a

22 city/31 hwy

6 cyl. /Auto

n/a

21 city/30 hwy

Brakes and Stopping Comparison

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For better stopping power the Z4’s standard brake rotors are larger than those on the Boxster:

Z4

Boxster

Front Rotors

13 inches

12.4 inches

Tires and Wheels Comparison

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The Z4’s optional 255/30R19 rear tires provide better handling because they have a lower 30 series profile (height to width ratio) that provides a stiffer sidewall than the Boxster’s optional 35 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the Z4 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Boxster doesn’t offer run-flat tires.

Suspension and Handling Comparison

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The Z4’s front to rear weight distribution is more even (49.4% to 50.6%) than the Boxster’s (45% to 55%). This gives the Z4 more stable handling and braking.

For better maneuverability, the Z4’s turning circle is .9 feet tighter than the Boxster’s (35.1 feet vs. 36 feet).

Chassis Comparison

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The Z4 is 5.3 inches shorter than the Boxster, making the Z4 easier to handle, maneuver and park in tight spaces.

The Z4’s standard power retractable hardtop allows a seamless transition from an open car, to a completely sealed coupe. The Boxster doesn’t offer a retractable hardtop.

As tested by Road & Track, the interior of the Z4 sDrive35i is quieter than the Boxster S:

Z4

Boxster

At idle

46 dB

49 dB

Full-Throttle

76 dB

85 dB

Ergonomics Comparison

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If the windows are left down on the Z4 the driver can raise them all using the key in the outside lock cylinder or the keyless remote; on a hot day the driver can lower the windows. The driver of the Boxster can’t use the remote to operate the windows.

The Z4’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The Boxster’s standard manually variable intermittent wipers have to be constantly adjusted.

The Z4 has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning costs extra on the Boxster.

Economic Advantages Comparison

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Intellichoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the BMW Z4 will be $6724 to $7927 less than for the Porsche Boxster.

Recommendations Comparison

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Intellichoice recognized the BMW Z4 as a “Best Value of the Year” for the 2015 model year. The Porsche Boxster didn't win any recognition from Intellichoice.

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